I think part of the battle is setting reasonable expectations. If you allow yourself to get too caught up with passing, anxiety can overwhelm you. However if you become too careless, you may lose motivation and not prepare enough. It’s a balance and it’s different for everyone.
Here’s how I approched things …
Same as you, I sat for Level I last December. I worked hard on it, but I went into it knowing that if I passed, I would push straight for Level II in June, even knowing what an uphill battle it would be. So this pushed me to work for Level I, but I allowed myself the flexibility that if I failed, I would be better prepared for Level I again in June, and more importantly, would have much more time to prepare for Level II the following year. So I didn’t stress about the Level I result.
As it turned out, I passed Level I, and sat for Level II last Saturday. While I’m certainly anxious about the result, it’s not stressing me out, because I know I easily could have been sitting for Level I again. I consider the past 4+ months as a leg up on something that could have worked out to be a June 2016 Level II first attempt anyways.
Take it all with some perspective and try not to let the exams overwhelm your motivation. I won’t start freaking out until I’m on my 3rd or 4th attempt on an exam. God willing it’ll never come to that.